Hi, The "do what the f*ck you want" license has been discussed before as has this exact library on legal. It's is unresolved if you can use it. [1]
The main concern "With a wildly permissive license like WTFPL, provenance might possibly get overlooked." but it's also probably considered public domain so you may be able to get permission to use it (and that JIRA issue resolved). The offensive word in the license name isn't a legal concern. Thanks, Justin 1. https://issues.apache.org/jira/browse/LEGAL-135
